Compensating organ-pipe.



No. 709,349; PatantedSept. l6, I902. J. A. & w. MclNTOSH, v COMPENSATING ORGAN PIPE.

(Application filed. Oct. 22, 1900.)

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JOHN A. MOINTOSH AND WILLIAM MCINTOSH, OF TORONTO, CANADA, ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, TO PETER RYAN, JOSEPH RUSE, AND DAVID J. JOHNSTON, OF TORONTO, CANADA.

COM PENSATING ORGAN-PIPE.

SPECIFICATION forming part of Letters Patent No. 709,349, dated September 16, 1902.

Application filed October 22.1900. Serial No. 33,984- (No model.)

To all wit/0112 it may concern:

Be it known that We,JOHNA.MOINTOsH and WILLIAM MOINTOSH, manufacturers, of the city of Toronto, in the county of York, Province of Ontario, Canada, have invented certain new and useful Improvements in Oompensating Organ-Pipes, of which the following is a specification.

Our invention relates to certain improvements in the construction of the compensating mechanism described and claimed in United States Patent No. 552,148, dated December 31, 1895; and it consists, essentially, in certain improvements in the construction of the general regulator, in the method of its support, and in the means employed for leveling the edges of the individual regulatoropenings in the pipes, substantially as hereinafter more specifically described and then definitely claimed.

Figure l is a front elevation of a set of organ-pipes provided with our improved compensating mechanism. Fig. 2 is an enlarged cross-sectional elevation of the same. Fig. 3 is an enlarged perspective view of a portion of the general regulator. I

In the drawings like letters of reference indicate corresponding parts in the difierent figures.

In Fig. 1 is shown a series of organ-pipes A, each provided with the individual regulators B,described in the United States patent hereinbefore referred to.

O is the general regulator, which also operates substantially as described in the said patent.

The purpose of the individual regulators is to vary the width of the slots in the pipes, the pitch of the pipes varying according to the width of the slot. The general regulator is for the purpose of varying the size of all the openings simultaneously,-so that the pitch of all the pipes may be simultaneously raised or lowered. It is to insure that the pipes shall all be in tune no matter What the position of the general regulator that the individual regulators are provided. Each pipe requires that its opening Cb shall be of a certain width, and this is best attained by the use of the individual regulators described.

Our present application relates particularly to the means employed for the simultaneous regulation of the pipes.

In constructing organs with compensating mechanism such as described in the said patent considerable difficulty was experienced in properly leveling the pipes,so that the compensating openings (t therein were all simultaneously opened and closed by the general regulator. Though it was found quite possible to so level the pipes, yet considerable difficulty was experienced and expense incurred, which we now entirely avoid, and at the same time obtain greater accu racy. Instead of leveling the pipes we therefore secure across them the leveling-strip D, the upper surface of which extends slightly above the lower edges of the compensating openings. This leveling-strip thus practically forms the lower edge of each opening, and when the general regulator is'brought into contact therewith all the openings are simultaneously closed.

Owing to the difficulty in forming an airtight contact between the general regulator and the leveling-strip, we prefer to face the top of the leveling-strip with the facing b, of cork, rubber, or other yielding substance.

Originally the general regulator was formed of a strip of wood. Owing to its liability to warp or shrink, this construction was found to be faulty. NVe therefore form the general regulator of a strip 0 of some stiff non-warpable material, such as aluminium, and face it with a strip of leather d or other yielding material. The aluminium gives stifiness and strength, and the leather gives closeness of contact with the back of the pipes.

To hold the general regulator against the backs of the pipes, We secure a series of springblocks E to the base F of the leveling-strip. D. The heads of these blocks bear against the back of the general regulator, while the center portion 0 of each block being thinned down, as shown, gives a spring-pressure upon the regulator. It is found advisable in some places, however, to reinforce the springblocks with flat metal springs f, which are held in position by the screws( screwed into the base F of the leveling-strip D and passing through slightly-enlarged holes or slots in the spring-blocks.

Above the regulator O is the stop G, formed ICC of a strip of wood extending across the pipes. This serves to limit the upward motion of the general regulator.

In the United States patent referred to the upper edges of the openings also required to be leveled, as the pipes were tuned with the general regulator entirely clear of the openings. The same difficulty in leveling was experienced here as in leveling the lower edges of the openings. WVe therefore set the stop G so that the lower edge of the regulator when the latter is in contact with the stop slightly overlaps the openings and forms the upper edge of each opening. Other means might be employed, of course, to limit the upward movement of the regulator, but we prefer that shown.

The general regulator may be operated in any desired manner and is given parallel motion by means of the links H and I.

We find that a compensating pipe-organ built in accordance with on rinventionis commercially practicable, as no necessity exists for mathematical accuracy in lining up the pipes. No trouble is caused by warping, owing to the construction of the general regulator, and swelling and sticking or loose working through drying of the parts are obviated by the means employed for pressing the general regulator against the backs of the pipes.

It will of course be understood that the terms upper and lower in this specification are merely relative and the actual position of parts so relatively described may be changed without detriment to the operation of the invention.

What we claim as our invention is 1. A series of organ-pipes having com pensati'ng openings formed therein, in combination with a leveling-strip secured against the pipes, to form one edge of each opening, and a general regulator movable over the said openings and adapted to engage the said leveling-strip to close the openings, substantially as and for the purpose specified.

2. A series of organ-pipes having compensating openings formed therein, in combination with a general regulator formed of a strip of stifi non-warpable material faced with a strip of a yielding material on the side next the pipes, and spring-actuated means for pressing the regulator against the pipes, substantially as and for the purpose specified.

3. A series of organ-pipes having compensating openings formed therein, in combination with a leveling-strip secured against the pipes to form one edge of each opening, a general regulator movable over the said openings and adapted to engage the said leveling-strip to close the openings, and spring-actuated means for pressing the regulator against the pipes, substantially as and for the purpose specified.

4. A series of organ-pipes having compensating openings formed therein, in combination with a general regulator movable over the said openings and spring-actuated means for pressing the regulator against the pipes, substantially as and for the purpose specified.

5. A series of organ-pipes having compensating openings formed therein, in combination with a leveling-strip secured against the pipes to form one edge of each opening, a strip of yielding material secured to the said leveling-strip; and a general regulator movable over the said openings and adapted to engage the said leveling-strip to close the openings, substantially as and for the purpose specified.

6. A series of organ-pipes having compensating openings formed therein, in combination with a leveling-strip secured against the pipes to form one edge of each opening, substantially as and for the purpose specified.

7. A series of organ-pipes having'compensating openings formed therein, in combination with a general regulator and a stop for limiting the motion of the regulator so that it always forms one edge of each opening, substantially as and for the purpose specified.

8. A series of organ-pipes having compensating openings formed therein, in combination with a leveling-strip secured against the pipes to form one edge of each opening, a gen eral regulator movable over the said openings and adapted to engage the said leveling-strip to close the openings, and a stop for limiting the motion of the regulator so that it always forms the other edge of each opening, substantially as and for the purpose specified.

Toronto, October 7, 1900.

- JOHN A. MOINTOSH.

WILLIAM MOINTOSH. In presence of J. Eow. MAYBEE, A. J. OOLBOURNE. 

